The evaporator coil (aka the coil) is the unsung hero of any heating and cooling system. Its job, absorbing the heat from the air, is one of the most important factors in achieving comfortable temps in your home or office year-round.

So, what is it? How does it work? And how do I maintain it?

First, let’s take a look at what it is.

What is the evaporator coil?

The evaporator coil is located inside the home near the air handler where the blower fan is. Evaporator coils are made from copper, steel, or aluminum because these metals conduct heat efficiently. Outside of the coils are fins. The fins protect and allow the air to pass through to the evaporator coils.

How does it work?

As the air conditioner runs, the compressor pulls cold, low-pressure refrigerant through the tubing in the evaporator coil, passing through the expansion valve. As the coolant flows, the blower fans draw the warm air from the room over the evaporator coils. The refrigerant absorbs the heat from the passing air. As it does this, it warms up and evaporates.

When the warm water vapor hits the coils, the water vapor condenses into liquid form. This process is how your evaporator coil reduces the humidity in your home or office. Together, with the condenser coil, the coil helps to keep you comfortable in all seasons.

How do I maintain it?

Evaporator coils must be kept well-maintained for efficient cooling. As the outdoor unit draws air in, some debris may come with it. This debris, in the forms of dust, dirt, or other airborne particles, can collect on the evaporator coil fins.

The build-up can make it harder for the coils to remove heat from the air. Have a local A/C service and repair company clean the coils at least once a year. Also, make sure you change your air filter regularly to minimize dust collection on the coils.

Without regular maintenance, the coils may become too dirty. If you wait too long, they may accumulate condensation, causing the unit to freeze. Frozen coils could cause the system to overheat or stop working.

Schedule your air conditioning and furnace maintenance today. If you live in the Northwest Arkansas area, call the professionals at Advantage Air & Service today. (479) 361-8647